File Encryption & Decryption with Python

Hi, guys and girls using this post I will show you how to encrypt and decrypt a file using python(no any module).

let's start coding

First, you need to create the 'key' variable. you can use any number for this variable value,

key = 15

now you need to open which file is you need to encrypt(python file handling)

file  = open('path to file you need to encrypt','rb')

file_data = file.read()

file.close()


now you need to convert above 'file_data' variable to byte array

byte_array = bytearray(file_data)

now you need to do one by one byte_array item combine with 'key'  using bitwise XOR (^)operator (python operators)

for index,value in enumerate(byte_array):

    byte_array[index] = value^key

now you need to do write to the new file changed byte array

new_file = open('path to new file','wb')
new_file.write(byte_array)
new_file.close()

before encrypt

after encrypt

you decrypt encrypted file reverse this process

Thank you!